Nut-lock.



No. 891.512. PATENTED JUNE 23, 1908. E; 0.- WHBELOGK,

NUT LOCK .nnrrnn sfraa ns ERNEST O, WHEELOGK,

OF CHICAGO, ILLINOIS.

NUT-LOCK.

Specification of Letters Patent.

Patented'J'une 23, 1908.

Application filed July 28, 1905, Serial 271,570. Renewed May 12, 1908.Serial No. Q3234?! To all whom itmay concern:

Be ,it knownthat I, ERNEST OWnnn LOCK, citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain'new and useful Improvements in Nut-Locks; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention relates tonut-locking de. vices, and consists in a means ofnew con 'struction, operating on a new principle, whereby the nut ismalntamcd in position on its bolt, without danger of accidental loosen.mg.

The essential features are a main nut and a lock-nut so formed that whenarranged toether and in contact to be screwed on the bolt, their threadsdo not register, that is, are not continuous. Preferably onenut isprovided with a shank eccentric to its hole, and the other nut with acorresponding eccentric socket-to receive said shank. When the nuts arearranged in contact so that their holes register, their threads are notcontinuous and are preferably about one half ofthe pitch apart, that is,the thread of the lock nut begins at about the opposite side of the nutfrom the point on the main nut at which the thread of the latterterminates, whereby it results that, when the nuts are set together andscrewed on the bolt, at first they are rotated and move upon the bolt asone nut,

but when the bolt has passed through the main nut, it will not engagewith the thread of the lock-nut until it has pushed the latter away fromthe main nut a space equal to about one half of .thescrew pitch.Therefore when the main nut has finally been turned home, the lock-nutmay be set up this space or distance before'its inner face engages againwith the outer face of the main nut, and, therefore, without mutilatingor stripping the thread But what does occur is that in turning, thelock-nut home or toward the main nut, the eccentric shank of one turnsin the eccentric socket of the other, and as that movement begins, theholes at once are changed from their registering position and the boltitself is bent, so that, when the lock-nut has been given the possibleone half turn or even much less, an absolute lock is efiected and thenuts can never jar, or become loose from any accident or vibration, it

centric socket on the other.

requiring considerable force to turn back the lock-put, and, at the sametime, bend the 'bolt back straight. If the. locknut 1s so turned back toits original position, both nuts nut, it being possible to set it up ashort distance only as in case of a jam nut, with a tendency to stripthethread at once.

IVhereas, in my invention the lock-nut effects a positive lock and doesnot act as a jam nut or check nut, for, in ordinary operation, it doesnot, and need not, engage with the main or securing nut, or even touchsaid main nut, except on the surfaces of the shank and socket, that is,on those eccentric surfaces.

My invention will be underst od by reference to the drawing herewith, inwhich the reference numerals of the specification indicate thecorresponding parts in all the figures.

Figure I shows the bolt in elevation and the nuts in section, toillustrate the separated position of the latter in which their threadsare continuous. Figs. II and III are cross sections of the nuts showingthem rcspectivelyset in contact" and separated. Figs. IV and V are faceviews of the nuts showing them with the holes registering, and notregistering respectively. Figs. VI and VII are face views of the nutsoperated to show the eccentric shank on one end and the oc- Fig. VIII isa side elevation of the nuts separated,- and set with their holes toregister.

In the figures, 1 indicates the bolt, 2 the main nutand 3 the-lock-nut.In one position the nut holes register, and means must be provided bywhich one nut may be turned on the other and the holes changed fromstraight registration to irregular or broken registration. To this endeither nut may be provided with an eccentric shank and the other with acoirespomling socket.

As here shown, the. lock-nut has the eccentric shank 4 and the main nutthe eccentric circular socket 5 adapted to receive the shank. Preferablyexternal indicating marks (5 are placed on the two nuts to indicate theposition in which they should be set to bring their holes in registeringposition. These marks are important to save trouble in arranging the twonuts, and to insure a correct position thereof.

The parts of my invention are simple to make and very efl'ective andsuccessful in practical operation, being adapted for use with devices oflarge or small size. Even the largest bolts may be so bent as to lockthe ma n nut securely. With large devices it is in some cases desirableto oil the eccentrics to insure easy turning.

l laving thus (.les(.-ribed my invention ,what I claim as new and desireto secure by Letters Patent, is

1. In a nut'locking device, the combination with a bolt. of usualconstruction, of a main nut and a lock-nut tittedto the bolt, thethreads of said nuts being so arranged as not to be continuous when thenuts are in ('1 l)ttt(ft,':tll(i means whereby the lock-nut may beturned on the main nut and their holes shifted from a registering to anonregistering position.

.5. in a nut-locking device, the combination with a threaded bolt, of amain nut and a lock-nut, one nut being provided with an eccentric,circular shank fitting a corresponding, eccentric socket on the othernut, the threads of said nuts being so arranged'as not to be continuous,when the nuts are arranged With their holes-registering.

3. In a nut-locking device, the combination with a bolt, of a main nutand a lock nut, the lock-nut having an eccentric shank fitting aneccentric socket on the main nut, the thread on said lock-nut beingarranged to begin at about the opposite side of the nut from the endingof the threaden the main nut, whereby the two nuts cannot be turned uptogether on the bolt, without" separation. v p

4. In a-ni'it-locking device, a main nut and a lock-nut provided onewith an eccentric shank'around its hole fitting a correspondingeccentric socket on the other, the nut threads being so arranged thatthey are not continuous when the nuts are set in contact with theirholes registering, whereby the nuts must be separated a substantialspace when being turned up on the bolt.

In testimony whereof I atiix my signature in presence of two witnesses.

ERNEST O. \VUEELOCK.

Vitnesses:

. L. PETTOLETII,

JULIUs I l ABERMANN.

